ON THE ERRATIC BLOCKS OF THE BRITISH ISLES. 373 
Beastall’s Sandpit, Balby— 
1 Shap granite ; 1 andesitic agglomerate. 
Bilbrough. In two gravel pits east of the village— 
(In order of prevalence.) Carboniferous sandstone, limestone, and chert ; 
Triassic Red Sandstone ; Magnesian Limestone ; clay-ironstone ; dolerite 
(2? Cleveland Dyke) ; 1 Shap granite. 
Fulford. Gravel pit south of Rose Hall— 
Sandstones; Carboniferous Limestone, and chert; Lake district andesites. 
High Catton. Gravel pit in supposed moraine— 
Carboniferous sandstone, limestone, and chert; flints; Carrock Fell diorite ; 
Magnesian Limestone ; red Triassic sandstone ; Brockram ; L.D. andesites ; 
Shap granite. 
Some of the stones were highly polished, apparently by wind. 108 stones 
taken at random proved to comprise 62 sandstones (most, if not all, 
Carboniferous), and 46 Carboniferous Limestone and chert. 
Holtby. In railway-cutting through ridge of Boulder-clay— 
Carboniferous sandstone, limestone, and chert; Carboniferous basement bed 
(2 from Vale of Eden); Keuper marl with salt-pseudomorphs; fibrous 
gypsum; Red Triassic Sandstone; Lias, with Gryphea; L.D. andesites ; 
basalt (? Whin Sill); Magnesian Limestone; 3 Shap granite; 1 Scottish 
granite (? Loch Doone). 
Reported by the Hull Geological Society. 
All the boulders tabulated (p. 374) were 7m situ in the clay or were close 
to the cliffs from which they had recently fallen. For convenience of com- 
parison the 36 miles of coast are divided into Sections A, B, C, &c., 
usually indicated by some well-marked natural feature or landmark. The 
figures in heavy type indicate the actual: number of boulders noted, in each 
Section. The lighter figures give the relative percentage. 
Reported by Mr. J. W. STATHER. 
North Ferriby—tn the Boulder-clay cliff on the Humber shore near 
North Ferriby, and on the adjacent beach, 373 boulders noted, of 8 inches 
_ and upwards in diameter, the classification of which yields the following 
results :— 
Per cent. 
69 Carboniferous Limestones  . : . : c : . 185 
104 Sandstones, grits, conglomerate, &c. (probably nearly all 
from Carboniferous or other Palzozoic rocks) ‘ 7 9 
49 Sandstones, &c. (probably nearly all of Mesozoic age) . 5 eG 
21 Lias ; A c : - ; : : : . ys) 
10 Chalk (including 4 black flints) : ; . 26 
88 Basaltic and other eruptive rocks . : : : ‘ . 235 
32 Granites, schist, gneiss, &c. 85 
373 100°0 
Reported by Mr. Paut Davis and Mr. J. W. S. Starusr, F.G.S. 
Redcar to Saltburn (4 miles).—In the Boulder-clay cliffs 133 boulders 
a foot and upwards in diameter were observed. 
